& $\beta$ & $\sigma_{3}$ & $\sigma_{2}$ & $\sigma_{1}$ \\ \cmidrule(r){2-5}Control Group Only &0.94&1.86&0.95&0.78\\ 
&(0.00)&(0.13)&(0.03)&(0.01)\\ 
Full Sample &0.34&1.16&0.56&0.34\\ 
&(0.05)&(0.24)&(0.04)&(0.00)\\ 
